Sofa



FIG. 1 is a front perspective view of the sofa;

FIG. 2 is a front view of the said sofa;

FIG. 3 is a back view of the sofa;

FIG. 4 is a left side view of the sofa;

FIG. 5 is a right side view of the sofa; and,

FIG. 6 is a top view of the sofa. 

The ornamental design for a sofa, as shown and described. 